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phosphorylase |
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phosphorylase /phos·phor·y·lase/ (fos-for´ĭ-lās)
1. any of a group of enzymes that catalyze the phosphorolysis of glycosides, transferring the cleaved glycosyl group to inorganic phosphate. When not qualified with the substrate name, the term usually denotes glycogen phosphorylase (animals) or starch phosphorylase (plants). 2. any of a group of enzymes that catalyze the transfer of a phosphate group to an organic acceptor.
phosphorylase [fosfôr′ilās] Etymology: Gk, phosphoros, bringer of light + ase, enzyme suffix any of a group of physiologically important enzymes that catalyze reactions between phosphates and glycogen or other starch components, yielding glucose-1-phosphate. phosphorylase [fos-for´ĭ-lās] an enzyme that, in the presence of inorganic phosphate, catalyzes the conversion of glycogen into glucose-1-phosphate.
phosphorylase a key regulatory enzyme that, in the presence of inorganic phosphate, catalyzes the removal of one glucose unit from glycogen to glucose-1-phosphate. citrulline phosphorylase see ornithine carbamoyl transferase. phosphorylase kinase an enzyme that activates phosphorylase by catalyzing the phosphorylation of serine. See also kinase. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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